Very recently, a novel coronavirus which was temporarily named “2019 novel coronavirus (2019-nCoV)” emerged in Wuhan, China [1]. As of 1 February 2020, 2019-nCoV has resulted in a total of 11,821 laboratory-confirmed human infections in China, including 259 deaths, and 132 exported cases in 23 countries outside of China (https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situation-reports). Currently, there is no vaccine or effective antiviral treatment against 2019-nCoV infection.